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Malfunction
Traction does
not work
Irregular engine
speed, engine
stop function
does not work
D 43 42
Cause
Travel drive fuse defective
Power supply interrupted
Travel drive monitoring
(type-specific) defective
Electro-hydraulic servo unit
of the pump defective
Insufficient supply pressure
Drive shaft of hydraulic
pumps or engines broken
Fuel level too low
Fuse "engine speed
control" defective
Electrical power defect
(line break or short circuit)
Remedy
Replace (fuse strip on the oper-
ating panel)
Check potentiometer, cables,
connectors; replace if necessary
Replace
Replace the servo unit
Check and adjust if necessary
Check the suction filter; replace
the supply pump and the filter
if necessary
Replace pump or engine
Check the fuel level; refill fuel
if necessary
Replace (fuse strip on the oper-
ating panel)
Check potentiometer, cables,
connectors; replace if necessary
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